.navbar-nav>li>a {	
    font-size: 18px;
    color:rgba(220,220,220,1);
}
.navbar-nav>li>a:hover {	
    font-size: 18px;
    color:rgba(220,220,220,1);
}
.navbar-brand a .show_img{
	display: none;
}
.navbar-brand a .hide_img{
	display: inline-block;
}